WO2012033821A1 - Appareil et procédé de positionnement d'implant de prothèse - Google Patents

Appareil et procédé de positionnement d'implant de prothèse Download PDF

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Publication number
WO2012033821A1
WO2012033821A1 PCT/US2011/050670 US2011050670W WO2012033821A1 WO 2012033821 A1 WO2012033821 A1 WO 2012033821A1 US 2011050670 W US2011050670 W US 2011050670W WO 2012033821 A1 WO2012033821 A1 WO 2012033821A1
Authority
WO
WIPO (PCT)
Prior art keywords
patient tissue
component
locating block
spacing arm
indicator
Prior art date
Application number
PCT/US2011/050670
Other languages
English (en)
Inventor
Joseph P. Iannotti
Wael K. Barsoum
Jason A. Bryan
Original Assignee
The Cleveland Clinic Foundation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by The Cleveland Clinic Foundation filed Critical The Cleveland Clinic Foundation
Priority to CA2810233A priority Critical patent/CA2810233C/fr
Priority to EP11757511.8A priority patent/EP2613718B1/fr
Priority to CN201180048471.4A priority patent/CN103338714B/zh
Publication of WO2012033821A1 publication Critical patent/WO2012033821A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/14—Surgical saws ; Accessories therefor
    • A61B17/15—Guides therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/17—Guides or aligning means for drills, mills, pins or wires
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A61F2/4607—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of hip femoral endoprostheses
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B2017/568—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor produced with shape and dimensions specific for an individual patient
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/10—Computer-aided planning, simulation or modelling of surgical operations
    • A61B2034/107—Visualisation of planned trajectories or target regions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/10—Computer-aided planning, simulation or modelling of surgical operations
    • A61B2034/108—Computer aided selection or customisation of medical implants or cutting guides
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30537—Special structural features of bone or joint prostheses not otherwise provided for adjustable
    • A61F2002/30538—Special structural features of bone or joint prostheses not otherwise provided for adjustable for adjusting angular orientation
    • A61F2002/3054—Special structural features of bone or joint prostheses not otherwise provided for adjustable for adjusting angular orientation about a connection axis or implantation axis for selecting any one of a plurality of radial orientations between two modular parts, e.g. Morse taper connections, at discrete positions, angular positions or continuous positions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2002/4687—Mechanical guides for implantation instruments

Definitions

  • the present invention relates to a positioning apparatus and method for a prosthetic implant and, more particularly, to a method and apparatus for guiding resection of a patient tissue and guiding placement of a prosthetic implant component in a desired implant position with respect to the resected patient tissue.
  • MIS Minimally invasive surgery
  • an MIS hip replacement technique involves a skin incision of approximately 7 cm and is performed without the previously required laying-open of the patient's entire hip area.
  • MIS techniques for joint replacement may reduce trauma to the patient, with less pain, less blood loss, shorter convalescence, faster stabilization, and fewer post-operative restrictions on exercising of the joint.
  • the use of MIS may also give the prosthetic joint a better fixation and function than traditional surgery, which in turn can contribute to an increased lifetime for the prosthetic joint.
  • MIS also can be done with considerably shorter hospitalization time than traditional techniques, and may even be available for outpatient procedures, providing an economic benefit linked to positive patient outcome in many cases.
  • Prosthetic hip joint replacement is performed by the head of the femur being cut off and replaced by a femoral component that is fixed down in the femoral canal.
  • a ball is mounted on the femoral component and mates with a cup that is fixed in the pelvis, or vice versa.
  • One factor which may lead to success for a total hip replacement technique is the provision of a clear overall view of the wound during the operation in order to achieve precise surgery and the desired positioning for the prosthetic components. In the precise surgery associated with the implantation of a hip replacement prosthetic component, it is important for the head of the femur to be removed with great precision.
  • an osteotomy template generally used, whereby the level and orientation of the planned cutting plane is transferred to the patient's femur to guide the surgeon.
  • a computer model of the patient's femur will often be produced, based on CT, radiographic, or other pre-operatively obtained images. Based on this model (including various considerations, e.g., height, version, and/or offset), a desired, cutting plane for the patient's femur can be determined.
  • the humeral head is removed and replaced with a prosthetic head which is fixed to the bone using a stem within the humeral metaphysis or diaphysis shaft.
  • the humeral head articulates with the native glenoid (hemiarthroplasty) or with a prosthetic glenoid component.
  • the humeral osteotomy is made at or near the anatomic neck of the humerus. This osteotomy defines a humeral head neck shaft angle and version of the final implant.
  • the anatomic neck may be difficult to define, making it difficult for the surgeon to determine to precise location of this osteotomy. Standard generic stock cutting guides currently used for this procedure still require the surgeon to identify these anatomic landmarks to place the cutting guides.
  • Osteotomy templates exist for use in conventional surgery, but there is currently a need for improved osteotomy templates.
  • a resection guide for use in many hip, shoulder, or other types of prosthetic replacements, whether using MIS or another surgical, style, would be useful than currently used guides by being considerably smaller, intended for insertion through different openings, employing different anatomical landmarks, allowing for a more accurate osteotomy, and easier to position in the planned position than the currently used resection guides.
  • a positioning apparatus for guiding resection of a patient tissue and guiding placement of a prosthetic implant component in a desired implant position with respect to the resected patient tissue.
  • a locating block includes a mating surface contoured for mating contact with the patient tissue. The mating surface is custom-configured for the patient tissue responsive to pre-operative imaging of the patient tissue.
  • a cutting plane indicator provides a physical indication of a desired cutting plane for the resection. The cutting plane indicator is positioned on the locating block to guide a cutting implement in perform ing the resection of the patient tissue along the desired cutting plane when the mating surface is in mating contact with the patient tissue.
  • a placement indicator is spaced, apart from the locating block and includes a component-contacting feature.
  • An elongate spacing arm is operative to space the placement indicator apart from the locating block.
  • the spacing arm has oppositely disposed, first and second spacing arm ends.
  • the first spacing arm end is attached to the locating block and the second spacing arm is attached to the placement indicator.
  • the spacing arm is configured to place the component-contacting feature of the placement ind icator at a predetermined placement position in three-dimensional space relative to the patient tissue.
  • the placement position predetermination is at least partially based upon pre-operative imaging of the patient tissue.
  • a method of guiding resection of a patient tissue and guiding placement of a prosthetic implant component in a desired implant position with respect to the resected patient tissue is described.
  • a mating surface of a locating block is placed in mating contact with the patient tissue.
  • the mating surface is custom-configured for the patient tissue responsive to pre-operative imaging of the patient tissue to allow a single locating block mating orientation relative to the patient tissue.
  • a physical indication of a desired cutting plane for the resection is provided using a cutting plane indicator included on the locating block.
  • a placement indicator, spaced apart from the locating block and including a component-contacting feature, is provided . The placement indicator is spaced apart from the locating block with an elongate spacing arm.
  • the spacing arm has oppositely disposed first and second, spacing arm ends.
  • the first spacing arm end is attached to the locating block and the second spacing arm is attached to the placement indicator.
  • the component-contacting feature of the placemen t indicator is placed at a predetermined placement position in three-dimensional space relative to the patient tissue with the spacing arm.
  • the placement position predetermination is at least partially based upon pre-operative imaging of the patient tissue,
  • a cutting implement is guided with the cutting plane indicator to resect the patient tissue along the desired cutting plane when the mating surface is in mating contact with the patient tissue.
  • the prosthetic implant component is placed in an initial implant position with respect to the patient tissue.
  • the prosthetic implant component is adjusted with respect to the patient tissue to bring the prosthetic implant component toward a desired implant position.
  • a preselected surface of the prosthetic implant component is brought into contact with the component-contacting feature to indicate that the prosthetic implant component has achieved the desired implant position.
  • a system for guiding resection of a femoral head and guiding placement of a prosthetic hip implant component in a desired implant position with respect to the resected femoral shaft is described.
  • a locating block includes a mating surface contoured for mating contact with the femoral shaft. The mating surface is custom-configured for the femoral shaft responsive to pre-operative imaging of the femoral shaft.
  • a cutting plane indicator provides a physical indication of a desired cutting plane for the resection.
  • a placement indicator includes a component-contacting feature.
  • An elongate spacing arm is operative to space the placement indicator apart from the locating block.
  • the spacing arm has oppositely disposed first and second spacing arm ends. The first spacing arm end is attachable to the locating block and the second spacing arm is attached to the placement indicator.
  • the spacing arm when attached to the locating block, is configured to place the component-contacting feature of the placement indicator at a predetermined placement position in three-dimensional space relative to the femoral shaft.
  • the placement position predetermination is at least partially based upon pre-operative imaging of the femoral shaft.
  • the locating block includes a spacing arm coupling feature for selectively receiving the first spacing arm end.
  • Fig. 1 is a schematic top view of an embodiment of the present invention
  • Fig. 2 is a cross-sectionai view taken along line 2-2 of Fig. 1 ;
  • FIGS. 3-9 schematically depict a sequence of operation of the embodiment of Fig. 1 in an example use environment
  • Fig. 10 is an exploded bottom view of an embodiment of the present invention
  • Fig. 11 is a side view of the embodiment of Fig. 10 in the example use environment
  • Fig. 12 is a cross-sectional view taken along line 12-12 of Fig. 1 1.
  • Fig. 1 depicts a schematic view of a positioning apparatus 100 for guiding resection of a patient tissue (not shown) and guiding placement of a prosthetic implant component (not shown) in a desired implant position with respect to the resected patient tissue.
  • the patient tissue is shown and described herein as a femur and the prosthetic implant component is shown and described herein as a femoral prosthetic hip component, but the patient tissue and corresponding prosthetic implant component could be any desired types such as, but not limited to, hip joints, shoulder joints, knee joints, ankle joints, phalangeal joints, metatarsal joints, spinal structures, iong bones (e.g., fracture sites), or any other suitable use environment for the present invention.
  • the positioning apparatus 100 includes a locating block 102.
  • the locating block 102 includes a mating surface (204, shown in cross-section in Fig. 2), the mating surface being custom-configured for the patient tissue responsive to preoperative imaging of the patient tissue.
  • the mating surface 204 could be at least partially configured through the use of computer tomography ("CT") data of the patient tissue.
  • CT computer tomography
  • the mating surface 204 could be at least partially configured through use of patient scans including digital or analog radiography, magnetic resonance imaging, or any other suitable imaging means.
  • the patient tissue pre-operative images are optionally displayed for review and manipulation before/during configuration of the mating surface 204, such as through the use of a computer or other graphical workstation interface.
  • the configuration of the mating surface 204 is described herein as being performed using three-dimensional images; however, one or more two-dimensional depictions of the patient tissue may also or instead be consulted during
  • the mating surface 204 is configured to mate with a surface of the patient tissue, as will be discussed below.
  • the term "mate" is used herein to indicate a relationship in which the contours of two structures are at least partially matched or coordinated in at least two dimensions. In the described mating relationship, the mating surface 204 mates or nests into contact with the surface of the patient tissue to provide the locating block 102 with at least one of location and stabilization assistance with respect to the patient tissue.
  • the locating block 102 also includes a cutting plane indicator 106 providing a physical indication of a desired cutting plane for the resection.
  • the cutting plane indicator 106 is positioned on the locating block 102 to guide a cutting implement (not shown) in performing the resection of the patient tissue along the desired cutting plane when the mating surface 204 is in mating contact with the patient tissue.
  • the cutting plane indicator 106 could be a (closed) cutting slot, as shown in the Figures, an (open) cutting plateau forming an edge of the locating block 102, or may have any other suitable form for providing a physical indication of a desired cutting plane for the resection.
  • the cutting plane indicator 106 may be positioned on the locating block 102 for guiding contact with the cutting implement performing the resection of the patient tissue.
  • the cutting plane indicator 106 may be configured to directly support and guide the cutting implement (either a cutting edge/structure or a non-cutting/support surface) via direct contact, which may be sliding or otherwise relatively moving contact between the cutting plane indicator and the cutting implement.
  • An alternate way for the cutting plane indicator 106 to guide the cutting implement might be for the user to keep the cutting implement a predetermined, distance from the cutting plane indicator without allowing direct contact therebetween.
  • a placement indicator 1.08 is spaced apart from the locating block 102 and includes a component-contacting feature 1 10.
  • the component-contacting feature 1 10 may be a component-contacting surface 1 ] 2 shaped to mate with a preselected surface (not sho wn) of the prosthetic implant component (as will be described below) to indicate that the prosthetic implant component has achieved a desired implant position.
  • a preselected surface of the prosthetic implant component is concave or convex
  • the component-contacting surface 1 12 may at least partially mirror that concavity or convexity.
  • the component-contacting surface 112 could be as small or large as desired for a particular application of the present invention.
  • the preselected surface of the prosthetic implant component is concave or convex
  • the component-contacting surface 1 12 may at least partially mirror that concavity or convexity.
  • the component-contacting surface 112 could be as small or large as desired for a particular application of the present invention.
  • component-contacting surface 1 12 could contact the preselected surface of the prosthetic implant component using a contact area of any size range between a single-point contact and an entire-preselected-surface-area contact.
  • the positioning apparatus 100 also may include an elongate spacing arm 1 14 operative to space the placement indicator 108 apart from the locating block 102.
  • the spacing arm 1 14 has oppositely disposed first and second spacing arm ends 1 16 and 1 18, respectively.
  • the first spacing arm end 3 16 is attached, permanently or temporarily, to the locating block 102 and the second spacing arm end 1 18 is attached, permanently or temporarily, to the placement indicator 108.
  • the spacing arm 1 14 is configured to place the component-contacting feature 1 10 of the placement indicator 108 at a predetermined placement position in three-dimensional space relative to the patient tissue.
  • the placement position predetermination may be at least partially based upon pre-operative imaging of the patient tissue.
  • the spacing arm 1.14 may be separately provided from the locating block 102.
  • the locating block 102 may include a spacing arm coupling feature (not shown) for selectively receiving the first spacing arm end 1 18.
  • the spacing arm coupling feature could be a notch, socket, aperture, pin, pincers, or any other suitable structure positioned on the locating block 102 and configured to selectively receive and hold the first spacing arm end 118, possibly in conjunction with a complementary feature (not shown) of the spacing arm 1 1.4. It may be desirable to provide at least one of the spacing arm 1 14 and the spacing arm coupling feature with an orienting structure to limit the relative orientation(s) in which the spacing arm can be coupled to the locating block 102.
  • the locating block 102 may include a locating pin aperture 120 configured for engagement with a locating pin (not shown), separately associated with the patient tissue.
  • a locating pin (not shown), separately associated with the patient tissue.
  • the locating pin in cooperation with the locating pin aperture 120, may assist with providing at least one of securement, stability, and position indication for the locating biock relative to at least one of the patient tissue and a prosthetic implant component.
  • Figs. 3-9 schematically depict the positioning apparatus 100 of Figs. 1.-2 in a sequence of use. Element labels are omitted for clarity from many individual structures of the positioning apparatus 100 in Figs. 3-9.
  • Fig. 3 depicts a native patient tissue, shown here as the upper portion of a femur including a femoral shaft 322 and a native femoral head 324.
  • a locating pin 326 has been associated with the patient tissue, though such is not necessary for use of the positioning apparatus.
  • the locating pin 326 has been inserted into the femur 322 at a predetermined location on the femoral shaft, possibly with the help of preoperative or intraoperative imaging and/or a pin placement aid device (not shown).
  • the locating pin 326 (or another locating pin, not shown) could also or instead be associated with the patient tissue through guidance by the positioning
  • Any of the described locating pins could be associated with the patient tissue in any desired manner and could remain in association with the patient tissue for any desired period of time and used to assist with any desired tasks, whether or not these tasks involve the positioning apparatus 100.
  • the locating pin aperture 120 has been engaged with the locating pin 326 by the locating pin aperture being placed over and slid down the locating pin. (As just stated, it is also contemplated that the locating pin 326 could be guided into association with the patient tissue by a previously placed positioning apparatus 100.)
  • the engagement between the locating pin aperture 120 and the locating pin 326 may be as tight or loose as desired, even to a point of laxity at which the locating pin does not contact the inside of the locating pin aperture in the position shown in Fig. 4.
  • the mating surface 204 has been mated with an outer surface of the femoral shaft 322 to provide at least one of securement, stability, and position indication for the locating block 102 relative to the femoral shaft.
  • the mating surface 204 had, prior to achieving the position shown in Fig. 4, been custom-configured for the femoral shaft 322 responsive to pre-operative imaging of the patient tissue to allow a single locating block 102 mating orientation relative to the femoral shaft.
  • the contours of the mating surface 204 have been matched to the contours of the native patient tissue surface of the femoral shaft 322 to admit of only one nesting or mating orientation between the locating block 102 and the femoral shaft 322 when both are brought into mutual stable contact.
  • This single-orientation mating characteristic between the locating block 102 and the femoral shaft 322 helps to assure the user that the cutting plane indicator 106 has been located stably in the desired location for the predetermined cutting procedure to take place. Any mismatch in orientation between the locating block 102 and the femoral shaft 322 will result in a wobbly, unstable contact to tactilely indicate to the user that the predetermined mating orientation has not been achieved.
  • the spacing arm 1 14 is not present and a spacing arm coupling feature 428 can be viewed.
  • the spacing arm coupling feature 428 is an aperture, which may extend partially into, or entirely through, the mass of the locating block 102, and is configured to selectively accept the first spacing arm end 1 16.
  • the aperture providing the spacing arm coupling feature 428 may be shaped to permit the first spacing arm end 1 16 to be inserted in only one rotational orientation (i.e., to dictate the final position/orientation of the placement indicator 108).
  • the spacing arm 1 1.4 may be separated from the locating block 102 at any phase of use of the positioning apparatus 100 and for any reason; for example, the spacing arm may be omitted during the resection phase if it otherwise might interfere with the desired cutting plane. In the latter case, the first spacing arm. end 1 16 may be attached to the locating block 102 after the patient tissue has been resected through use of the cutting plane indicator 106. Alternately, however, the spacing arm 1 14 could be attached to the locating block 102 throughout the process of use of the positioning apparatus 100.
  • Fig. 5 illustrates the resection phase of use for the positioning
  • a cutting implement 530 such as the depicted bone saw, is guided by the cutting plane indicator 106 to resect the patient tissue along the desired cutting plane.
  • the desired cutting plane extends perpendicular to the plane of Fig. 5, is coincident with the cutting plane indicator 106, and severs the femoral head 324 from the femoral shaft 322 at the femoral neck 532.
  • the cutting plane indicator 106 may be positioned on the locating block 102 as a result of preoperative planning to determine the desired cutting plane with respect to the patient tissue.
  • the user either contacts the cutting plane indicator 1 06 with the cutting implement 530, optionally in a sliding manner, or maintains the cutting implement in a desired non-contact relationship with the cutting plane during the resection process.
  • the manner in which the guiding of the cutting implement 530 occurs may vary in different applications of the present invention, and may readily be provided by one of ordinary skill in the art with consideration of at least one of the type of cutting implement, nature and/or amount of the patient tissue to be removed, location and/or size of the surgical incisions, and any other suitable factors.
  • the entire femoral neck 532 is severed to completely release the femoral head 324.
  • the patient tissue may be partially severed or otherwise mechanically altered (cut. drilled, reamed, routed out, or the like), using one or more cutting implements 530 or other tools, as desired for a particular surgical procedure.
  • Additional structures could be temporarily or permanently provided to the positioning apparatus 100 to act as stops for partial cuts or otherwise to help guide the desired patient tissue alteration. These additional structures, when present, may be stock/standard items or may be custom-fitted to the patient in the bespoke manner of the mating surface 204.
  • Fig. 6 the native femoral head 324 has been removed, leaving the resected patient tissue of the femoral shaft 322. (The actual resection cut line is concealed from view in this Figure by the locating block 102.)
  • the cutting implement 530 has been removed from the surgical site, but the locating block 102 is maintained in the pre-established mating orientation/position with the femoral shaft 322 through continued nesting/mating contact between the mating surface 204 and the femoral shaft.
  • the locating pin 326 is still engaged (whether loosely or tightly) with the locating pin aperture 320 in Fig. 6, as well, which may help to maintain the pre-established mating orientation/position.
  • the user may perform additional, intermediate surgical processes.
  • the femoral shaft 322 could be reamed out to accept a stem of a prosthetic femoral implant component (not shown), the resected surface of the femoral shaft may be machined or altered, or any other desired surgical processes could be performed.
  • the locating block 102 could be temporarily removed from the femoral shaft 322 to facilitate a surgical process.
  • the locating pin 326 may remain in place (e.g., as shown in Fig. 3) to help reorient the positioning apparatus into the Fig. 6 configuration when the surgical process prompting the removal has been completed.
  • the locating pin 326 may also be temporarily removed, leaving a hole in the femoral shaft 322 into which the locating pin can be reinserted as desired.
  • the placement indicator 108 and spacing arm 1 14 can be attached to the locating block to form the configuration shown in Fig. 7.
  • the first spacing arm end 1 16 has been inserted into the aperture in the locating block 102 which acts as the spacing arm coupling feature 428 in the schematically depicted arrangement.
  • Any other suitable spacing arm coupling feature 428 and corresponding spacing arm 114 could be also or instead used to attach the spacing arm to the locating block 102.
  • the structures of the positioning apparatus 100 are functioning cooperatively to hold the component-contacting feature 1 10 (here, a concave surface functioning as a component-contacting surface 1 12) in a predetermined orientation with respect to the mating surface 204. Since the mating surface 204 is configured to nest in a predetermined mating relationship with the femoral shaft 322, the commutative property between the patient tissue (femora! shaft) and. the positioning apparatus 100 results in the component-contacting surface 1 12 being located in a particular and predetermined orientation with the femoral shaft when the positioning apparatus is configured as shown in Fig. 7.
  • a prosthetic hip implant component 734 having a prosthetic femoral ball 736, has been placed in an initial implant position with respect to the femoral shaft 322.
  • a stem (not shown) of the prosthetic hip implant component 734 has been inserted into a prepared cavity (not shown) in the femoral shaft 322, as is commonly done in hip replacement surgeries.
  • the prosthetic hip implant component 734 in the configuration of Fig. 7, is not in a desired final position, as evidenced between the separation between the prosthetic femoral ball 736 and the component-contacting feature 3 10. Therefore, the prosthetic hip implant component 734 needs to be adjusted with respect to the femoral shaft 322 to bring the prosthetic hip implant component toward a desired, implant position.
  • This desired implant position may be, but is not necessarily, reflective of at least one of the original position of the native patient tissue being replaced by the prosthetic implant component and the existing position of a contralateral native patient tissue (e.g., the existing right hip femoral head when the left one is being replaced with a prosthetic version).
  • the desired implant position can also or instead be determined pre-operatively by the user, optionally with the assistance of pre-operative scans of the native patient tissue and/or virtual models of the prosthetic implant component(s).
  • the adjustment needed in Fig. 8 to move the prosthetic hip implant component 734 to the desired implant position is a slight rotation (signified by clockwise arrow 738) within the femoral shaft 322.
  • the engagement between the locating pin 326 and the locating pin aperture 120 may help to maintain the positioning apparatus 100 in the pre-established mating orientation/position during manipulation of the prosthetic hip implant component 734 and/or the femoral shaft 322.
  • the prosthetic hip implant component 734 achieves the configuration shown in Fig. 9 with respect to the femoral shaft 322. As visible in Fig, 9, a preselected surface of the prosthetic hip implant component 734 (here, a portion of the convex surface of the prosthetic femoral ball 736) is brought into contact with at least a portion of the component-contacting feature 1 10 (here, the concave component-contacting surface 1.12) to indicate that the prosthetic hip implant component has achieved the desired implant position.
  • a preselected surface of the prosthetic hip implant component 734 here, a portion of the convex surface of the prosthetic femoral ball 736
  • the component-contacting feature 1 10 here, the concave component-contacting surface 1.12
  • the component-contacting surface 1 12 may mate with the preselected surface of the prosthetic hip implant componen t 734 to indicate that the prosthetic hip implant component has achieved the desired implant position. Accordingly, the component-contacting surface 1 12 may have a contour selected to mirror the contour of the preselected surface of the prosthetic hip implant component 734.
  • the desired implant position may be based upon a spatial relationship with at least one of the native patient tissue and the positioning apparatus 100.
  • the desired implant position may be a predetermined centering position with respect to at least one of the femoral shaft 322 and a native hip socket (not shown), and/or may be a predetermined height position with respect to the locating block 102.
  • the component-contacting feature 110 need not be a component-contacting surface 1 12, but could instead be a tip of a finger- or rod-like structure (not shown) which contacts a preselected surface of the prosthetic implant component substantially at a single point on that preselected surface. It is also contemplated that the preselected surface of the prosthetic implant component could include a feature (not shown) configured to mate with the component-contacting feature 1 10, regardless of its form, for a positive location indication.
  • Figs, 30-12 depict an example embodiment of the present invention.
  • the embodiment shown in Figs. 10-12 differs slightly from the schematic embodiment of Figs. 1-9 in several ways.
  • a handle 1040 is attached to the first spacing arm end 1 14, for selective attachment to the locating block 102.
  • the handle 1040 when present, may assist with manipulation and/or steadying of the positioning apparatus 100 by a user.
  • the cutting plane indicator 1.06 shown in Figs. 10-12 is a cutting plateau, in contrast to the cutting slot shown in Figs. 3 -9.
  • the spacing arm coupling feature 428 is a lug-and-bracket arrangement, in which a protrusion at the first spacing arm end 3 16 hooks onto an aperture of the locating block 102.
  • Figs. 1 1 -12 shown as a hip replacement environment
  • the native femoral neck has already been severed to resect the native femoral head (not shown) and the prosthetic hip implant component 734 has been placed in the femoral shaft 322, as shown in the cross-sectional view of Fig. 12.
  • the prosthetic hip implant component 734 has been adjusted into the desired implant position, as evidenced by the mating relationship between the prosthetic femoral ball 736 and the component-contacting surface 1 12.
  • This mating relationship, and that between the mating surface 204 and the femoral shaft 322, are depicted with a slight gap therebetween for clarity of depiction here, but may be considered to be directly in contact in the use environment, as desired.
  • component-contacting feature 110 are a unitary structure in the example use environment of Figs. 10-12, the user may repeatedly associate and dissociate this unitary structure with the locating block 102 as desired during the surgical procedure. Engagement between the locating pin 326 and locating pin
  • aperture 120 may assist in achieving and/or maintaining the mating relationship between the mating surface 204 and the femoral shaft 322, regardless of the position of this unitary structure with respect to the locating block 102.
  • Figs. 10-12 may be used during a surgical procedure similarly to the use process described above with reference to the general, schematic embodiment of Figs. 1-9.
  • a shoulder arthroplasty may include similar principles and surgical steps to those described above for a hip surgery.
  • the device described can be adapted to the patient's surface anatomy of the proximal humerus.
  • the cutting block may be placed over the anterior or superior surface anatomy of the humerus (depending upon the surgical exposure ⁇ i.e., the deltopectoral or superior approach, respectively).
  • the location of the cutting block may be based upon the local bone anatomy defined by pre-operative imaging and the unique surface contour of the patient's native anatomy, and may be further defined by a spacing or extension arm attached from the cutting block to the apex and/or surface of the humeral head.
  • the cutting plane indicator 106 is shown as being simply linear and described as a physical indication of a desired cutting plane, the guided cutting motion could also or instead encompass a curvilinear, curved, multi-angle linear, or otherwise not-simply-linear cutting plane indicator (not shown), being a physical indication of a possibly non-planar desired cutting contour.
  • Any of the described structures and components could be integrally formed as a single piece or separately provided of any suitable material or combinations of materials; however, the chosen material(s) should be biocompatible for most applications of the present invention.

Abstract

La présente invention concerne un appareil de positionnement destiné à guider une résection de tissu d'un patient, et à orienter la pose d'un composant d'implant prothétique dans une position d'implant désirée par rapport au tissu réséqué du patient. L'invention porte en outre sur son procédé d'utilisation. Un bloc de localisation comprend une surface d'appariement formée de manière à permettre un contact d'appariement avec le tissu du patient. Un indicateur de plan de découpe procure une indication physique d'un plan de découpe désiré pour la résection. Un indicateur de mise en place est espacé du bloc de localisation, et comprend un élément de mise en contact avec un composant. Un bras d'espacement allongé permet d'espacer l'indicateur de mise en place du bloc de localisation. Ledit bras d'espacement est conçu pour placer l'élément de mise en contact avec le composant de l'indicateur de mise en place à une position de mise en place prédéfinie, dans un espace en trois dimensions par rapport au tissu du patient. La prédéfinition de la position de mise en place est au moins partiellement basée sur l'imagerie préopératoire du tissu du patient.
PCT/US2011/050670 2010-09-07 2011-09-07 Appareil et procédé de positionnement d'implant de prothèse WO2012033821A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA2810233A CA2810233C (fr) 2010-09-07 2011-09-07 Appareil et procede de positionnement d'implant de prothese
EP11757511.8A EP2613718B1 (fr) 2010-09-07 2011-09-07 Appareil de positionnement d'implant de prothèse
CN201180048471.4A CN103338714B (zh) 2010-09-07 2011-09-07 假体植入部的定位设备

Applications Claiming Priority (2)

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US38047610P 2010-09-07 2010-09-07
US61/380,476 2010-09-07

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US (2) US8821499B2 (fr)
EP (1) EP2613718B1 (fr)
CN (1) CN103338714B (fr)
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US9011452B2 (en) 2015-04-21
CN103338714A (zh) 2013-10-02
EP2613718B1 (fr) 2016-05-18
CA2810233C (fr) 2018-09-25
CN103338714B (zh) 2015-11-25
US8821499B2 (en) 2014-09-02
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EP2613718A1 (fr) 2013-07-17
US20120130382A1 (en) 2012-05-24

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